Inegration of Receivables Between RMS and Great Plains

We run a diverse range of businesses that are using RMS to run our retail stores and Great Plains SOP for our distribution and sports fishing operations. We have quite a lot of overlap in our cutomers on both systems. We are trying to find an easy way to integrate our receivables ledgers to give us a single point of receivables management. The current level of integration between RMS and Great Plains is not adequate to do this. Has anyone else had similar issues? Nick